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  Modeling and finite element simulation of loading-path-dependent hardening in sheet metals during forming

Clausmeyer, T., Güner, A., Tekkaya, A. E., Levkovitch, V., & Svendsen, B. (2014). Modeling and finite element simulation of loading-path-dependent hardening in sheet metals during forming. International Journal of Plasticity, 63, 64-93. doi:10.1016/j.ijplas.2014.01.011.

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 Creators:
Clausmeyer, Till1, Author              
Güner, Alper2, Author              
Tekkaya, Ahmet Erman2, Author              
Levkovitch, Vladislav3, Author              
Svendsen, B.4, 5, Author              
Affiliations:
1Institute of Mechanics, TU Dortmund University, Leonhard-Euler-Str. 5, Dortmund, Germany, ou_persistent22              
2Institute of Forming Technology and Lightweight Construction, TU Dortmund University, Baroper Str. 301, Dortmund, Germany, ou_persistent22              
3Beck Engineering Pty Ltd, Niedstrasse 20, Berlin, Germany, ou_persistent22              
4Material Mechanics, Faculty of Georesources and Materials Engineering, RWTH Aachen University, Schinkelstraße 2, D-52062 Aachen, Germany , ou_persistent22              
5Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              

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Free keywords: Anisotropic behaviors; Constitutive behaviors; Finite element simulations; Geometric deviations; Granular microstructure; Interstitial free steel; Quantitative measures; Yield conditions
 Abstract: A recent material model considering the evolution of plastic anisotropy in interstitial free steels is validated for the forming process of the channel die, a complex part. In the model the evolution of the intra-granular microstructure is represented by tensor-valued internal variables. The model accounts for the cross hardening behavior observed in rheological tests of interstitial free steels. A novel cross hardening indicator which is directly derived from the constitutive model is proposed. This cross hardening indicator is a quantitative measure for the occurrence of cross hardening in the forming process of complex parts. A correlation between the occurrence of cross hardening and larger values of the stored (elastic) energy is observed. The influence of cross hardening on the forming process is investigated, in particular, the drawing forces and the geometric deviations due to springback. The influence of cross hardening on the forming process of the channel die geometry is small. The influence of cross hardening on the more complex S-Rail geometry is larger due to larger plastic deformation and more severe loading path changes. The concept of the proposed transient hardening indicator should be applicable to other models for the evolution of plastic anisotropy. A possible use of the cross hardening indicator would be the efficient choice of the material model in the context of sheet metal forming simulations. (C) 2014 Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2014-12
 Publication Status: Published in print
 Pages: 30
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: International Journal of Plasticity
  Abbreviation : Int. J. Plast.
Source Genre: Journal
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Publ. Info: New York : Pergamon
Pages: - Volume / Issue: 63 Sequence Number: - Start / End Page: 64 - 93 Identifier: ISSN: 0749-6419
CoNE: https://pure.mpg.de/cone/journals/resource/954925544230